Question

Oxidation of acetaldehyde with selenium dioxide produces:
 A.Ethanoic acid
 B.Methanoic acid
 C.Glyoxal
 D.Oxalic acid

Answer 1

Hint: We need to know that when aldehyde is oxidized, it relies upon whether the response is done under acidic or basic conditions. Under acidic conditions, the aldehyde is oxidized to a carboxylic corrosive. Under basic conditions, this could not shape since it would respond with the antacid. A salt is framed all things considered.

Complete answer:
We have to know that acetaldehyde is a natural synthetic compound with the equation $C{H_3}CHO$ , here and there curtailed by scientific experts as $MeCHO$ . It is perhaps the main aldehyde, happening generally in nature and being delivered for a huge scope in industry. Acetaldehyde happens normally in espresso, bread, and ready organic products, and is delivered by plants. It is additionally delivered by the incomplete oxidation of ethanol by the liver protein liquor dehydrogenase and is a contributing reason for headache after liquor utilization. Pathways of openness incorporate air, water, land, or groundwater, just as drink and smoke. Utilization of di-sulfiram restrains acetaldehyde dehydrogenase, the protein answerable for the digestion of acetaldehyde, accordingly making it develop in the body.
Oxidation of acetaldehyde with selenium dioxide produces glyoxal.
The balanced chemical equation has to be given below,
$C{H_3}CHO + Se{O_2} \to CHO - CHO\left( {glyoxal} \right) + Se + {H_2}O$

Hence, the correct option is (C) glyoxal.

Note:
Glyoxal is a natural compound. It is the littlest di-aldehyde. It is a glasslike strong, white at low temperatures and yellow close. The fluid is yellow, and the fume is green. Pure glyoxal isn't generally experienced in light of the fact that it structures hydrates, which oligomerize. For some reasons, these hydrated oligomers behave equivalently to glyoxal. It is delivered modernly as a forerunner to numerous items.